Method of making well drill-jars.



W. A. SPARKS.

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Patented Apr. 6, 1915.

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WILLIAM A. SPARKS, OF CHARLESTON, WEST VIRGINIA, ASSIGNOR-TO SPARKS DRILL- ING JAR COMPANY, OF CHARLESTON, 'WEST VIRGINIA, A-CORPORATION OF WEST VIRGINIA.

METHOD OF MAKING WELL DRILL-JARS.

y Application filed 'February 4, 1914.

T0 all whom it may concern.'

Be it known that I, WiLLiAM Al SPARKS, a citizen of the United States, residing at Charleston, in the county'of Kanawha and State of West Virginia, have invented certain new and useful Improvements in Methods of Making Well Drill-Jars; and I do hereby declare the following to be a f ull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. f

In oil well drilling, where it is usually necessary that a well be drilled through rock, it has been found desirable to einploy drill jars which willpermit of rotating movement of the parts as well'as reciprocating action.

This invention relates to a method of making well drill jars without the employment of welding heat or the screw threading of the parts, the members of the jar being formed from solid'pieces of metal so united that one jar member may rotate as well as reciprocate with relation to the other` jar member.

A purpose ofthe invention is to reduce the the cost of manufacture of a set of drill jars, and produce vwell drill jars which will give a greater impact' or jar for the size and weight of the material, than the commercial jars now in use, and especially the ordinary link jars; tov produce jars'in which the material retains its natural strength, not having been vitiated by welding heat, and thereby increase the durability of the prpduct; to produce a jar, the members of which will be permanently connected; and to provide a set of jars of feu1 parts which, if they become broken in a well, will result in an easy, inexpensive shing operation to remove the broken parts from the partially drilled Well.

One method of producing well drill jars of the-type set forth, may now be stated and is illustrated in the accompanying drawings, in which:

Figure l is a side elevation, partly insection, illustrating one embodiment of the invention. Fig. 2 is a side elevation, partly in section, illustrating another embodiment of the invention. Fig.A 3 is a vertical sectional view through a socket member of Fig. 1. Fig. 4 is a side elevation of a sectional rei Specication of Letters Patent.

Patented Apr. 6, 1915. Serial No. 816,497.

the parts being shown sepa- `'of the type illustrated herein, the pist-on member 10 is-made from a single solid piece of metal free from welds, which is placed in a suitable tool, such as a lathe, to produce a hammer portion 1l, a shank 12, and a head 13, all the parts being integral. The shank l2 is illustrated as of less diameter than the hammer portion 11 to produce a shoulder 14. This shoulder 14 may be provided withy a rounded non-battering lower edge 15, and the metal at the juncture of the hammer l1 and shank 12 may be rounded as at 16.

It is preferred to elongate the head 13 and to incline or round the upper portion 17 wherejit joins the shank, and to round the lower face4 18. All of these parts may be made in the usual or any preferred manner. The socket member 19 is also formed from a single solid pieceof metal, bored to produce an elpngated chamber 20 having its wall 21 o substantially the same thicknessy is a bottom plan view of the through throughout, as shown in Fig. 3, although in Fig. 6 the upper end of the wall 21 is thickened as at 22. The chamber20 may now be'provided with a rounded lower end or seat 23 to substantially fit the rounded end 18 of the head. and connecting with this seat may ber formed a drain duct 21 shown leading from the central portion of the seat 23to more efl'ectually clear the chamber 20 of foreign substances, and at the same time prevent rany injurious effect or battering of the head. The upper end of the socket member 19 may now be bored out at 25 to increase thediameter of the chamber 20 at the upper end thereof, producing a shoulder 26 intermediate the ends of the chamber, and leaving the chamber 20 open at the upper end 27 of the socket member. However, this larger portion 25 may be bored, previous to boringthe remainder of the chamber 20 which is of less diameter, in which event the shoulder will be formed, when the reduced diameter of the chamber is bored,

as a continuation of the first cut. The endY 27 of member 19 may now be heated to an ordinary red heat, and the head 13 inserted into the' chamber 20. A stop collar, shown comprising a plurality of sections 28-29, is now placed around the shank 12 of the piston and above the head 13, and this collar 28-29, is driven down into the widened portion of the chamber 20 until the.

metal.

lf desired, the heated end 27 ofthe wall of the chamber 20 may be simply allowed to cool and contract around the collar 28-29, although it is preferred to contract the metal of the end'27 around the collar'28--29 and the shan'k 12, by a suitable tool, such as a hammer, topermenently secure the' collar within the socket, and. thereby lock the piston member to the socket member. Should the socket member become elongated bythe heating and compressing operations, the parts ma be placed in a suitable toolr and the end'2 of the socket member y19 trimmed down until the end 18 of the head 13 engages its lower seat 23 at substantially the same time that the hammer portion 11 engages the end 27. This feature of the jar serves to relieve the strain on the head of the piston member, prevents the head from spreading or thickening, and also prevents the shankl of the piston member from bending, buckling or expanding, when under compression and stress of the drilling operations. Moreover, the engagement of the cylindrical head with the walls ofthe chamber and the guidj ing action of the collar members 28--29 on the shank' 12, operate to bringthe head into register with itsv oppositely positioned seats 23, 30 within the chamber 20.

In Figs. 2, 6, 7 and 8, the socket member is provided with a thickened upperwall,v as at 22, and the outer surface ofthe upper end of the collar members 28-29 is Vslightly cut away as at 31. The lower end of the collar of 7 is provided with a seat 30 for the head 1n the same manner as the collar illustrated in Fig. 4. In assembling the parts, the thickened part of the wall 22 may be heated and compressed around the tapered or cut away portion 31 of the collar 28-29, to the positlon shown in Fig.' 2, thereby permanently securing the collar tothesocket and permanently locking the piston member to the socket member. f

y Having thus described the invention, what l claim as new and desire to secure by Letters Patent is:

l. Thevmethodof making'well drill jars which consists of producing a hammer portion, shank and head of apiston member from a single solid piece of metal' free from welds, boring an elongated chamber into another slngle solid piece of metal, boring a continuation of said chamber of less diameter than the first bored portion to leave a shoulder, heating the wallsl of the rst named chamber, inserting the head of the piston member in the chamber of smaller diameter, placing a collar around the )shank ofthe piston member, 'and forcing the col-vf.`

lar into the chamber of greater diameter unnamed chamber, inserting the head of thel i piston member in the chamber of smaller di,- ameter, placing a'collar around the shank of the piston member, forcing .the collar into the chamber of greater vdiameter until the end ofthe collar engages the shoulder, and contracting the heated end of the chamber member around the collar. Y

3. The method of making well drill jars which consists of-producing a hammer portion, shank and the head of a pistonmember from a single solid piece of metal free from welds forming non-battering faces on the piston head, borin a chamber into another single solid vieee o metal, boring a continuation of sai chamber yof less diameter than the first bored portion-to leave a. shoulder between the portions of the chamber of dif` ferent widths, forming a substantially cylindrical collar of a plurality vof sections from another piece of metal, heating the u per end of the socket member, insertin t e head of the piston member into the c amber of smaller diameter, placing the sections ofthe collar around the shank of the piston member above the head, forcing the collar into the chamber of greater diameter until one end fof the collar engages the shoulder,

and contracting theheated end of the chamber member around said collar, thereby.`

locking the piston member into permanent engagement with `thesocket member.

4. The method of making well drill jars which consists of producing a iston member from a single solid piece o metal comrising a hammer portlon, a shank and a ead, forming `non-battering faces on the piston head, boring a chamber into another single solid piece of metal, and leaving a portion of the wall at the top of said chamber of greater thickness than an adjacent portion of saidwall, boring a continuation of said chamber of yless diameter than the first bored portion to leave a shoulder between the portions of the chamberv of different Widths, forming a substantially cylindrical collar of a plurality of sections from another piece of metal, cutting away a portion of the collar at the upper end thereof, heating the upper end of the socket member, inserting the head of the piston member into the chamber of smaller diameter, placing the sections of the collar around the shank of the piston member above the head,

forcing the collar into the chamber ofy greater diameter until one end of the collar kengages the shoulder, and contracting the heated end of the chamber member around said collar to compress the thickened portion of the Wall at the top of the chambery against the cut away portion of the collar to yprevent movement of the collar out of the A. W. FLoURNoY, L. G. SUMMERFIELD. 

